a lot of carbon dioxide up to 10 percent of the world's c o 2 emissions. scientists from germany and nigeria are studying alternatives they're experimenting with remains of local plants such as kosov appeals that have been incinerated at certain temperatures. and are from the ash that we collect we develop cement like products they could be used in place of cement binder sold at local markets that would reduce the c o 2 footprint. ash from rice hulls and other plant remnants are also showing promising results using plant based cement is an environmentally friendly alternative. not only can an endless supply of organic waste be put to good use the sustainable eco concrete is also much cheaper to